Goodwill and Other Intangible Assets (Schedule of changes in the carrying amount of goodwill) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Feb. 24, 2013
Goodwill [Line Items]
Beginning balance	$ 8,182.5
Acquisitions	402.3
Goodwill purchase accounting adjustments	8.3
Other activity, primarily foreign currency translation	72.6
Ending balance	8,665.7
U.S. Retail [Member]
Goodwill [Line Items]
Beginning balance	5,813.2
Acquisitions	28.2
Goodwill purchase accounting adjustments	0
Other activity, primarily foreign currency translation	0
Ending balance	5,841.4
International [Member]
Goodwill [Line Items]
Beginning balance	989.9
Acquisitions	374.1
Goodwill purchase accounting adjustments	8.3
Other activity, primarily foreign currency translation	47.9
Ending balance	1,420.2
Bakeries and Foodservice [Member]
Goodwill [Line Items]
Beginning balance	921.1
Acquisitions	0
Goodwill purchase accounting adjustments	0
Other activity, primarily foreign currency translation	0
Ending balance	921.1
Joint Ventures [Member]
Goodwill [Line Items]
Beginning balance	458.3
Acquisitions	0
Goodwill purchase accounting adjustments	0
Other activity, primarily foreign currency translation	24.7
Ending balance	$ 483.0